CN104099440A - Smoke control method in semi-steel steelmaking and semi-steel steelmaking method - Google Patents
Smoke control method in semi-steel steelmaking and semi-steel steelmaking method Download PDFInfo
- Publication number
- CN104099440A CN104099440A CN201410371576.9A CN201410371576A CN104099440A CN 104099440 A CN104099440 A CN 104099440A CN 201410371576 A CN201410371576 A CN 201410371576A CN 104099440 A CN104099440 A CN 104099440A
- Authority
- CN
- China
- Prior art keywords
- steel
- semi
- half steel
- vanadium extraction
- vanadium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention relates to a smoke control method in semi-steel steelmaking and a semi-steel steelmaking method and belongs to the field of metallurgy. The smoke control method in the semi-steel steelmaking provided by the invention is applied in the semi-steel steelmaking technology and comprises the following steps: a) after vanadium extraction, silicon iron or silicon carbide is added the process of which the semi-steel is discharged from a steel ladle, wherein the adding amount of silicon iron or silicon carbide is 0.5-1.0 kg/t (semi-steel); the vanadium extraction end point oxygen activity is controlled at 5*106-20*106; the vanadium extraction end point temperature is 1360-1400 DEG C; the technology conditions of the semi-steel end point is as follows: the semi-steel discharging time is 1.0-2.0 s/t (semi-steel); the roughing slag amount is 0.7-3.8 kg/t (semi-steel); b) when the semi-steel discharge is over, a covering agent of 0.5-1.0 kg/t (semi-steel) is added, wherein the main components of the covering agent are as follows: 30-45 % of SiO2, 5-20 % of Al2O3, 5-30 % of Fe2O3 and 10-25 % of MgO. According to the method, smoke in the semi-steel steelmaking after the vanadium extraction is reduced and the slag absorbing performance of the vanadium slag is improved simultaneously.
Description
Technical field
A kind of method that the present invention relates to semi-steel making flue dust control method and semi-steel making, belongs to field of metallurgy.
Background technology
The process of semi-steel making mainly comprises: vanadium-bearing hot metal obtains half steel by vanadium extraction by converter blowing, and half steel obtains molten steel through converter steelmaking, ladle refining, then obtains continuously cast bloom through continuous casting.
Adopting vanadium titano-magnetite when steel-making, because vanadium in steel, titanium content are higher, therefore before converter steelmaking, also will carry out vanadium extraction steel-making to molten iron, after vanadium extraction, half steel oxygen activity is 5～20 × 10
6, going out half steel process owing to there is reaction between carbon and oxygen, reaction product is carbon dioxide, causes half cylinder of steel to produce a large amount of flue dust, pollutes environment; In addition, because vanadium extraction is oxidizing reaction, vanadium slag oxidisability is very high, and viscosity is larger, and slag steel is not easily separated, causes pulling out slag difficulty after stove.
In prior art, not yet have about the relevant report that how to reduce the flue dust producing after semi-steel making vanadium extraction.
Summary of the invention
The present invention is directed to above-mentioned defect, a kind of semi-steel making flue dust control method is provided, the method can not only reduce the flue dust of semi-steel making after vanadium extraction, and that has improved vanadium slag pulls out slag performance simultaneously.
Technical scheme of the present invention:
The invention provides a kind of semi-steel making flue dust control method, in semi-steel making technique, the technique that goes out half steel process and go out half steel after finishing controlled, be specially:
After vanadium extraction finishes, going out in the process of half steel to ladle, add ferrosilicon or silicon carbide, the add-on of ferrosilicon or silicon carbide is 0.5～1.0kg/t
half steel; And control vanadium extraction terminal oxygen activity 5 × 10
6～20 × 10
6, vanadium extraction terminal temperature is 1360～1400 DEG C; The processing condition of half steel terminal are: go out half steel time 1.0～2.0s/t
half steel, the lower quantity of slag 0.7～3.8kg/t
half steel;
Go out after half steel finishes and add 0.5～1.0kg/t
half steelinsulating covering agent, insulating covering agent composition comprises: SiO
230～45%, Al
2o
35～20%, Fe
2o
35～30%, MgO10～25%.
Described half steel is the molten steel of vanadium titano-magnetite after desulfurization vanadium extraction, and it contains the C of 3.2-4.0% by weight percentage.
Preferably, when carbon content is 3.6-4.0% in half steel, add ferrosilicon; When carbon content is 3.2-3.5% in half steel, add silicon carbide.
A kind of Semi-steel making method, described Semi-steel making method comprises and adopts aforesaid method of the present invention to control the flue dust after vanadium extraction.
Beneficial effect of the present invention:
The invention provides a kind of novel method that reduces the later half cylinder of steel flue dust of vanadium extraction, simultaneously the method has also certainly been separated vanadium slag and has pulled out the problem of slag difficulty.When the method starts by go out half steel after vanadium extraction finishes, in half cylinder of steel, add ferrosilicon or silicon carbide, it is fully reacted with the oxygen in half steel.From the oxygen gesture figure of oxide compound, at the temperature of 1300～1400 DEG C, silicon is more easily combined with oxygen and is generated stable oxide compound compared with carbon; The reaction product generating is liquid Si O
2, because its density is little a lot of compared with molten steel, float up to half cylinder of steel surface and enter into slag, therefore both reduced the viscosity of remaining vanadium slag in half cylinder of steel, meanwhile, also avoid the larger problem of flue dust after stove.When the present invention has effectively solved and gone out half steel after vanadium extraction by converter blowing, after stove, flue dust is larger, the problem that environmental pollution is more serious, and that has improved vanadium slag pulls out slag performance simultaneously.
Embodiment
The invention provides a kind of semi-steel making flue dust control method, in existing semi-steel making technique, also comprise the steps:
A) vanadium extraction finish after going out in the process of half steel to ladle, add ferrosilicon or silicon carbide, the add-on of ferrosilicon or silicon carbide is 0.5～1.0kg/t
half steel; And control vanadium extraction terminal oxygen activity 5 × 10
6～20 × 10
6, vanadium extraction terminal temperature is 1360～1400 DEG C; The processing condition of half steel terminal are: go out half steel time 1.0～2.0s/t
half steel, the lower quantity of slag 0.7～3.8kg/t
half steel, half steel terminal temperature 1360-1390 DEG C, oxygen activity is 3 × 10
6～4 × 10
6;
B) go out after half steel finishes and add 0.5～1.0kg/t
half steelinsulating covering agent, insulating covering agent main component is: SiO
230～45%, Al
2o
35～20%, Fe
2o
35～30%, MgO10～25%.
In step a, the add-on of ferrosilicon or silicon carbide is definite according to the flue dust situation of half steel, generally determines add-on according to half steel oxygen activity, and add-on is excessive does not have negative impact, but has cost of alloy problem and melt homogeneity question; The restriction half steel tapping time is that oxygen activity and terminal temperature, the lower quantity of slag etc. have impact for grade and the yield etc. of vanadium slag after vanadium extraction in order to allow ferrosilicon etc. fully react with the oxygen in half steel; Therefore limited at this.Adding of insulating covering agent is conducive to further adjust the slag ingredient of half steel and half steel carried out to insulation effect.
Going out in half steel process, utilize half steel reinforced concrete punching that ferrosilicon/silicon carbide is fully reacted with oxygen in half steel, the reaction product of generation is SiO
2, because its density is little a lot of compared with molten steel, float up to half cylinder of steel surface and enter into half slag (vanadium slag); Thereby can replace the carbon deoxidation in steel, simultaneously deoxidation products SiO
2enter into slag, reduced the viscosity of slag, vanadium slag is more easily pulled out.
Described half steel is the molten steel of vanadium titano-magnetite after desulfurization vanadium extraction, and it contains C, the Si of 0-0.03% of 3.2-4.0% by weight percentage.
In the time that carbon content in half steel is 3.6-4.0%, add ferrosilicon; In the time that carbon content in half steel is 3.2-3.5%, add silicon carbide.
A kind of Semi-steel making method, described Semi-steel making method comprises and adopts aforesaid method of the present invention to control the flue dust after vanadium extraction.
Need explanation, in the present invention, half steel is the molten steel of vanadium titano-magnetite after desulfurization vanadium extraction, and wherein, the quality percentage composition of carbon is 3.2-4%, and silicon, manganese heating element content are negligible.
Below in conjunction with embodiment, the specific embodiment of the present invention is further described, does not therefore limit the present invention among described scope of embodiments.
Embodiment 1～4 mainly enumerates and adopts the half steel of the inventive method after to vanadium extraction to process, and reduces the method that half steel process and half cylinder of steel flue dust and raising and pull out slag performance.
Ferrosilicon composition is: 75% silicone content; Silicon carbide composition is: 56% silicone content, 24% carbon content;
Insulating covering agent main component is: SiO
230～45%, Al
2o
35～20%, Fe
2o
35～30%, MgO10～25%.
Embodiment 1
Adopt existing process for extracting vanadium, just, in vanadium extraction operation, go out the front half steel oxygen activity 10 × 10 of controlling of half steel
6, vanadium extraction terminal temperature is 1390 DEG C, when going out half steel and starting, in half cylinder of steel, adds ferrosilicon 0.5kg/t after vanadium extraction
half steel, utilize mixed punching that the silicon in ferrosilicon is fully reacted with oxygen in half steel.
The technique of simultaneously controlling half steel terminal is: after vanadium extraction, go out half steel time 1.0s/t
half steel, lower quantity of slag 1.4kg/t
half steel, half steel terminal temperature is 1380 DEG C, oxygen activity 3 × 10
6, go out half steel and finish backward half cylinder of steel surface and add insulating covering agent 1.0kg/t
half steel.Experiment is found, goes out the interior flue dust of half steel process and half cylinder of steel less, pulls out slag better performances.
Embodiment 2
Adopt existing process for extracting vanadium, just, in vanadium extraction operation, go out before half steel, control vanadium extraction terminal half steel oxygen activity 20 × 10
6, vanadium extraction terminal temperature is 1377 DEG C, goes out half steel and start to add ferrosilicon 1.0kg/t in half cylinder of steel after vanadium extraction
half steel, utilize mixed punching that the silicon in ferrosilicon is fully reacted with oxygen in half steel.
The technique of controlling half steel terminal is: after vanadium extraction, go out half steel time 2.0s/t half steel, lower quantity of slag 2.3kg/t
half steel, half steel terminal temperature is 1370 DEG C of molten steel, oxygen activity 4 × 10
6, go out half steel and finish backward half cylinder of steel surface and add insulating covering agent 0.5kg/t
half steel, go out half steel process and half cylinder of steel flue dust is less, pull out slag better performances.
Embodiment 3
Adopt existing process for extracting vanadium, just, in vanadium extraction operation, go out before half steel, control half steel oxygen activity 10 × 10
6, vanadium extraction terminal temperature is 1400 DEG C, goes out half steel and start to add silicon carbide 0.5kg/t in half cylinder of steel after vanadium extraction
half steel, utilize mixed punching that the silicon in ferrosilicon is fully reacted with oxygen in half steel.
The technique of controlling half steel terminal is: after vanadium extraction, go out half steel time 1.0s/t
half steel, lower quantity of slag 0.7kg/t
half steel, half steel terminal temperature is 1390 DEG C of molten steel, oxygen activity 4 × 10
6, go out half steel and finish backward half cylinder of steel surface and add insulating covering agent 1.0kg/t
half steel, go out half steel process and half cylinder of steel flue dust is less, pull out slag better performances.
Embodiment 4
Adopt existing process for extracting vanadium, just, in vanadium extraction operation, go out before half steel, control half steel oxygen activity 20 × 10
6, vanadium extraction terminal temperature is 1368 DEG C, goes out half steel and start to add silicon carbide 1.0kg/t in half cylinder of steel after vanadium extraction
half steel, utilize mixed punching that the silicon in ferrosilicon is fully reacted with oxygen in half steel.
The technique of controlling half steel terminal is: after vanadium extraction, go out half steel time 2.0s/t
half steel, lower quantity of slag 2.0kg/t
half steel, half steel terminal temperature is 1360 DEG C of molten steel, oxygen activity 3 × 10
6, go out half steel and finish backward half cylinder of steel surface and add insulating covering agent 0.5kg/t
half steel, go out half steel process and half cylinder of steel flue dust is less, pull out slag better performances.
Comparative example 1:
Adopt existing process for extracting vanadium, just, in vanadium extraction operation, go out before half steel, control half steel oxygen activity 20 × 10
6, vanadium extraction terminal temperature is 1370 DEG C, goes out half steel and start to add insulating covering agent 2.0kg/t in half cylinder of steel after vanadium extraction
half steel.
The technique of controlling half steel terminal is: after vanadium extraction, go out half steel time 2.0s/t
half steel, lower quantity of slag 2.3kg/t
half steel, half steel terminal temperature is 1355 DEG C, oxygen activity 3 × 10
6, go out half steel process and half cylinder of steel flue dust is larger, pull out slag poor-performing.
Comparative example 2
Adopt existing process for extracting vanadium, just, in vanadium extraction operation, go out before half steel, control half steel oxygen activity 20 × 10
6, vanadium extraction terminal temperature is 1370 DEG C, goes out half steel and start to add insulating covering agent 2.0kg/t in half cylinder of steel after vanadium extraction
half steel.
The technique of controlling half steel terminal is: after vanadium extraction, go out half steel time 0.7s/t
half steel, lower quantity of slag 4.5kg/t
half steel, half steel terminal temperature is 1355 DEG C of molten steel, oxygen activity 20 × 10
6.Go out half steel and finish backward half cylinder of steel surface and add insulating covering agent 0.5kg/t half steel, go out half steel process and half cylinder of steel flue dust is larger, pull out slag poor-performing.
Claims (4)
1. semi-steel making flue dust control method, is characterized in that, in semi-steel making technique, the technique that goes out half steel process and go out half steel after finishing is controlled:
After vanadium extraction finishes, going out in the process of half steel to ladle, add ferrosilicon or silicon carbide, the add-on of ferrosilicon or silicon carbide is 0.5～1.0kg/t
half steel; And control vanadium extraction terminal oxygen activity 5 × 10
6～20 × 10
6, vanadium extraction terminal temperature is 1360～1400 DEG C; The processing condition of half steel terminal are: go out half steel time 1.0～2.0s/t
half steel, the lower quantity of slag 0.7～3.8kg/t
half steel;
Go out after half steel finishes and add 0.5～1.0kg/t
half steelinsulating covering agent, insulating covering agent composition comprises: SiO
230～45%, Al
2o
35～20%, Fe
2o
35～30%, MgO10～25%.
2. semi-steel making flue dust control method according to claim 1, is characterized in that, described half steel is the molten steel of vanadium-bearing hot metal after converter extracting vanadium, and its C content is 3.2-4.0% by weight percentage.
3. semi-steel making flue dust control method according to claim 2, is characterized in that, when C content is 3.6-4.0% in half steel, adds ferrosilicon; When C content is 3.2-3.5% in half steel, add silicon carbide.
4. Semi-steel making method, is characterized in that, comprises and adopts control method described in claim 1-3 any one to control the flue dust after semi-steel making vanadium extraction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410371576.9A CN104099440B (en) | 2014-07-31 | 2014-07-31 | Semi-steel making flue dust control method and Semi-steel making method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410371576.9A CN104099440B (en) | 2014-07-31 | 2014-07-31 | Semi-steel making flue dust control method and Semi-steel making method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104099440A true CN104099440A (en) | 2014-10-15 |
| CN104099440B CN104099440B (en) | 2016-04-13 |
Family
ID=51667977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410371576.9A Active CN104099440B (en) | 2014-07-31 | 2014-07-31 | Semi-steel making flue dust control method and Semi-steel making method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104099440B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105063270A (en) * | 2015-08-04 | 2015-11-18 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for reducing semisteel steelmaking smoke dust |
| CN105063271A (en) * | 2015-09-08 | 2015-11-18 | 攀钢集团西昌钢钒有限公司 | Pig-iron ladle environment-friendly dust removal method |
| CN106048128A (en) * | 2016-08-15 | 2016-10-26 | 攀钢集团西昌钢钒有限公司 | Method for preventing blowing venting explosion of dry dedusting system of semi-steel steel-making converter |
| CN110184406A (en) * | 2019-07-12 | 2019-08-30 | 河钢股份有限公司承德分公司 | A kind of method for making steel for improving steel scrap and ratio being added |
| CN112301181A (en) * | 2020-09-21 | 2021-02-02 | 河钢股份有限公司承德分公司 | Method for inhibiting generation of vanadium extraction semisteel smoke dust |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102912068A (en) * | 2012-10-19 | 2013-02-06 | 攀钢集团攀枝花钢钒有限公司 | Slagging constituent for semisteel converter steelmaking and manufacturing method thereof |
| CN103205524A (en) * | 2013-04-15 | 2013-07-17 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for smelting low-sulfur steel from semi-steel |
-
2014
- 2014-07-31 CN CN201410371576.9A patent/CN104099440B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102912068A (en) * | 2012-10-19 | 2013-02-06 | 攀钢集团攀枝花钢钒有限公司 | Slagging constituent for semisteel converter steelmaking and manufacturing method thereof |
| CN103205524A (en) * | 2013-04-15 | 2013-07-17 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for smelting low-sulfur steel from semi-steel |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105063270A (en) * | 2015-08-04 | 2015-11-18 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for reducing semisteel steelmaking smoke dust |
| CN105063271A (en) * | 2015-09-08 | 2015-11-18 | 攀钢集团西昌钢钒有限公司 | Pig-iron ladle environment-friendly dust removal method |
| CN106048128A (en) * | 2016-08-15 | 2016-10-26 | 攀钢集团西昌钢钒有限公司 | Method for preventing blowing venting explosion of dry dedusting system of semi-steel steel-making converter |
| CN110184406A (en) * | 2019-07-12 | 2019-08-30 | 河钢股份有限公司承德分公司 | A kind of method for making steel for improving steel scrap and ratio being added |
| CN112301181A (en) * | 2020-09-21 | 2021-02-02 | 河钢股份有限公司承德分公司 | Method for inhibiting generation of vanadium extraction semisteel smoke dust |
| CN112301181B (en) * | 2020-09-21 | 2022-05-24 | 河钢股份有限公司承德分公司 | Method for inhibiting generation of vanadium extraction semisteel smoke dust |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104099440B (en) | 2016-04-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105018669B (en) | A kind of production method of nuclear power ingot iron | |
| CN105525055B (en) | A kind of control method of converter less-slag melting carbon period splash | |
| CN104099440A (en) | Smoke control method in semi-steel steelmaking and semi-steel steelmaking method | |
| CN110643785B (en) | Refining deoxidation method of low-carbon low-silicon welding wire steel | |
| CN1995404A (en) | Mono-slag converter process for producing high carbon low-phosphorus molten steel | |
| CN105671248A (en) | Smelting method of converter efficient dephosphorization | |
| CN102994871A (en) | Method for smelting medium/high-carbon hard-wired steel by vanadium-titanium containing molten iron | |
| CN104120352A (en) | 34CrMo4 gas cylinder steel and production method thereof | |
| CN101705336B (en) | Method for producing medium and low carbon ferromanganese through furnace refining | |
| CN108330240A (en) | Method of the aluminium without calcification processing drops in continuous casting Q235 steel grades | |
| CN103205536A (en) | Semi-steel dephosphorizing agent and semi-steel dephosphorizing method | |
| CN107502704B (en) | Method for reducing alumina inclusions in semisteel steelmaking casting blank | |
| CN104109727B (en) | The method of half steel converter smelting Low-phosphorus Steel | |
| CN103966388B (en) | A kind of method shortening the semisteel converter steelmaking of pure oxygen blow duration | |
| CN104060020A (en) | Dephosphorizing steelmaking method for increasing manganese content in molten steel at terminal of convertor | |
| CN100560740C (en) | A kind of CO that utilizes 2Gas reduces the method that fume from steel making produces | |
| CN109182640B (en) | Method for reducing carbon oxygen deposit at smelting end point of converter | |
| CN103966387B (en) | Adopt the method for semi-steel making | |
| CN110982984A (en) | Production process of Al deoxidized non-calcium treated steel | |
| CN108486454B (en) | Smelting method of ultra-low phosphorus steel | |
| CN102010926B (en) | Process for smelting and producing medium high carbon steel | |
| CN110218841B (en) | Method for producing ultra-low phosphorus steel by converter | |
| CN110205434B (en) | Method for smelting steel bar with low cost | |
| CN101705417B (en) | Method for producing medium and low carbon ferromanganese through furnace refining | |
| KR101707327B1 (en) | Method of manufacturing molten steel using electric arc furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |